Electric pendulum clock.



A, lABS. ELECTRIC PENDULUM czocx APPLICATION FILED 0GT.16, 1912..

Patented Mar. H5, 1915.

ASMUS JABS, OF ZURICH, SWITZERLAND.

ELECTRIC PENDULUM CLOCK.

Specification of Letters Patent.

Patented Mar. 16, 1915.

Application flied October 18, 1912. Serial No. 726,154.

To all )P/IOH? it may concern:

lie it known that I, Asnns JABS, a subject of the Emperor of Germany, and a resident of Zurich. Switzerland, have invented new and useful Improvements in Electric PendulllIll Clocks; and I do hereby declare the fol-' lowing to be a full. clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or tigures of reference marked thereon. which form a part of this specification.

it has hitherto been proposed to regulate by magnetism the deflection of the pendulums of electric peiululum-clocks. This is performed by means of the known so called ilipp's contact, which at too short oscillations of the pendulum places electromagnets in circuit, whereby an armature is move which by its motion imparts a new impulse to the pendulum.

In the improved device aceording to this invention the armature is fixedly connected to the forked pendulum crutch tlld the elec tromagnets are disposed so that the arma ture passes by its oscillation the front sides of the cleetromagnets so that the axes of the eleetroinagnet (ores coincide with the longitudinal central plane of the armature when the latter is in its position of rest. By this construction a reliable arrangement of the armature is obtained with regard to the clectromagnets and there is made use of the tltttlUIl'lZlglllilt l'oree at the most suitable point, because the end surfaces of the armatllle oscillate in the most intensive magnetic field. in consequence, thereof thin and light armatures can be used so that a more sensible regulation results.

In the accompanying drawing the invention is illustrated by way of example.

Figure l is a rear elevation of the device. Fig. 2 is a side elevation of the same. Fig. 3 is a section on line A-l3 of Fig. 1. Fig. 4 is a perspective view showing the armature and the forked pendulum crutch.

land 2 designate t-wo electromagnets, the cores l3 and pole-shoes 1- of which are connected to each other by a frame. 3 The frame 3 is screwed on bolts 15 which connect the plates 4 to each other. The forked pendulum crutch 6 is secured to the axle 5 which is mounted to turn in the plates 4 (Fig. Ll- On the axle 5 there is also rigidly mounted an armature 7 formed as a doublearmed lever. By this means the armature Tis rigidly connected to the crutch 6. By the oscillation of the crutch 6 by the pendulum 8 the armature oscillates in front of the electromagnet cores 13. The axes of the eleetromagnct cores 13 are disposed in the longitudinal central plane of the armature 7 if the latter is in its position of rest shown in Fig. l. The armature 7 is stamped from thin sheet-iron. To the rod of the pendulum 8 there is secured the known block 10 which is provided with av groove on the top. The pin 11 is pivotally connected to the s rin 1(3 and forms one contact of the leadh 1;, which contain the battery 18 and conduct to the electromagnet .vindmg.

19 designates me other contact spring which carries the contact 12.

The parts 15 16, 11 and 10 form the known so called Hipps contact. In consequence of too small a. deflection of the pendulum the pin 11 suspended free to turn rests in the groove of block 10 the circuit is closed between both springs 16 and 19. B this means the electroinagnets are excite by the magnetism an impulse is im or to the armature and thus the pendu um 8 is impelled once again. The crutch 6 carries a pawl 24) which intermittingly turns a. ratchet wheel .22 stopped by a 5 ring 21, from which ratchet Wheel the han s 23 and are turned by means of toothed Wheels and pinions.

I claim:

1. ln electric pendulum clocks, two electromaguets in axial alinement, an armature arranged to swing between said magnets with its longitudinal axis substantially in a plane passing through the longitudinal axes of the magnets.

2. in electric pendulum clocks, two electromagnets in substantially axial alinelment, an armature arranged to swing between said magnets with its longitudinal axis in a plane substantially througl the longitudinal axes of the magnets, and a fixed pendulum crutch rigidly connected to the armature.

3. In electric pendulum clocks, two electromagnets in axial alinement. an armature arranged to swing between them with its longitudinal axis in a plane passing through the axes of the magnets, a pendulum in operative rel ition to said to energize the magnet eflection lmcon'ies small armature, and means forked pendulum s when the pendulum said axle, substant I n testimony tha crutch rigidly secur ially as described. t I claim the foregoi ed to 10 ng as 4. In electric pendulum clocks, two axially my invention, I have signed my name in alined horizontal magnets, an armature to presence of two subscribing witnesses, swing between them whose longitudinal axis ASMUS J ABS. moves in a plane substantially through the Witnesses: longitudinal axes of the magnets, an axle Jon. KNOBEL, rigidly secured to the armature, and a CARL GUBLER. 

